Henning Mankell's Wallander
The Village Idiot
S1 E2:
When an intellectually handicapped man walks into a bank wearing a feather in his hair and claiming to have a bomb around his neck, the bank employees rush to do what he says; Wallander and team have to figure out if he’s someone’s pawn. Astrological references are the only clues they have to go on, and that’s something no one on the team knows anything about.